Test electric circuits 3º ESO

Electric current is the ___________ of _____________ in a _____________ material.

• movement, protons, conductor.

• flow, electrons, conductor.

• movement, neutrons, conductor.

These symbols represent...

• A generator.

• A fuse.

• A resistance.

• An electric shock.

If we close the switch and the buzzer breaks, which receivers work?

• The buzzer.

• None.

• The bulb and the motor.

If we close the switch, which bulbs are on if the bulb L3 fuses?

• None because there is no current in the circuit.

• L1, L2 and L4

• Only L4

The current intensity in the circuit is...

• 180 A

• 2.22 A

• 0.45 A

The voltage of the battery is...

• 6 V

• 9 V

• 4.5 V

The resistance of the bulb is...

• 45 Ω

• 550 Ω

• 88 Ω

How much does it cost to keep a 800 W water heater working for 12 hours if the energy cost is 0.15 € per KWh?

• 1.44 €

• 64 €

• 0.84 €

Which is the total current in the circuit? And the current through the bulb 2? (supposing the switch is close)

• I_total = 3A ; I₂ = 1A

• I_total = 3A ; I₂ = 0.5A

• I_total = 1.5A ; I₂ = 1A

The power (in KW) of an electric drill that works with 230 V and 6 A is...

• 1.38 kW

• 1380 kW

• 38.3 kW